CBC MARKETPLACE: HEALTH » PRESCRIPTION
DRUGS
Controversial flu drug approved despite
scientist's protests
Broadcast: November 7, 2000 | Producer:
Christian Côté; Reseachers: Cindy Bahadur; Mike
Gordon

"I felt I was making
a difference and I sort of saw myself as trying to
get to the real story," says Dr. Michael Elashoff |
It's
flu season -- and you may have heard of a new flu drug called
Relenza.
It
came onto the market last year with promises to make you
better, quicker than anything previously on the market.
What you might
not have heard about were the efforts of an American scientist
who tried to keep Relenza off the market.
The
manufacturer, Glaxo Wellcome, promised that Relenza would kill
the flu virus and make you feel better up to a day and a
half sooner. The cost: $50 for a five-day prescription. In
the aftermath, doctors lined up on both sides of the fence - those
who hailed a new flu treatment and others who were skeptical. Who
do you believe?
Marketplace went
to Washington, where it's up to the U.S. Food and Drug Administration
to say yes or no to a new drug getting on the American market.
We met a committed young scientist,
who felt the wrath of his FDA bosses and the drug manufacturer
when he tried to keep Relenza off the market.
Not
long ago, Dr. Michael Elashoff was a valued employee of the FDA.
His job was to do statistical reviews of new drug applications.
Treating the
flu with Relenza
You must see your doctor within
48 hours of suspecting that you have the flu. Even
then, studies suggest that at least half of all doctor
diagnoses of flu are wrong. In some cases, the illness
could be a more serious bacterial infection. |
But
these days Elashoff is poring over his resumé, not numbers.
He walked away from his promising career, because of a drug
he concluded was not effective - and should not be approved.
It's a conclusion for which he has paid a price ever since. Scientist
skeptical over Relenza's merits Elashoff
made his stand at a crucial FDA advisory committee meeting in February
of 1999, where his team gave their scientific review of Relenza.
The committee was then to advise the FDA whether to approve the
drug. Elashoff
had analysed data from three drug trials conducted by the maker
of Relenza - Glaxo Wellcome.
One trial studied the effects of
Relenza on a European population sample, the second studied
people who lived in the Southern Hemisphere, the third - and
largest - looked at North Americans.
"Glaxo
Wellcome claimed that in North America, Relenza decreased the overall
length of flu by one day," Elashoff told Marketplace. "The
analyses I did suggested that even one day was an overestimate,
and anywhere from a third of a day on down to no effect at
all is what I would consider a reasonable estimate of the
drug's full effect."
Relenza vs.
the flu shot
The main difference between
Relenza and the annual flu shot doctors urge you to
take is prevention. Doctors will tell you that a flu
shot is the best way to prevent getting the flu - although
it's not an absolute guarantee that you won't get it.
Relenza is a flu treatment. Doctors say it's not a
substitute for the flu shot. |
Glaxo
Wellcome, citing two studies outside North America, said Relenza
reduced flu symptoms by one to two-and-a-half days.
Company officials
took the floor at the committee meeting confident of its results
because the method it used to measure that reduction
in symptoms had been agreed to by the FDA before the
trials.
But
when Elashoff took the floor, he gave a much different interpretation.
With the approval of his bosses,
Elashoff tested the trial data several different ways - not
just the method agreed to by Glaxo Wellcome and the FDA.
"The
North American study was as large as the other two studies put together,"
Elashoff said. "It was almost a complete failure in the
sense that people who received nothing did just as well as people
who received Relenza." Elashoff's
findings hit home. Thirteen of 17 committee members voted Relenza
did not demonstrate its effectiveness - and should not be approved.
Some said they were reluctant to vote no. One called the new drug
a base hit, but not a home run.
Glaxo
Wellcome disputes Elashoff's findings
Just
days after striking out with the Advisory Committee, Glaxo Wellcome
sent a seventeen page letter to the FDA. The letter, obtained by
the CBC, detailed a number of procedural problems with the Committee.
The
pharmaceutical company's chief concern was Michael Elashoff. The
letter mentioned him 30 times. Glaxo Wellcome protested his interpretation
of their numbers.
The company said Elashoff's method wasn't
what it agreed to before the trials. Glaxo Wellcome called Elashoff's
work flawed, extreme and inappropriate.
Some provinces won't cover drug
Relenza costs about $50 for a five day prescription. It's
not covered by any provincial drug plan. Some of the provinces
told Marketplace they won't cover it because they
share Michael Elashoff's conclusion that the drug is not an
effective treatment. |
A
couple of weeks later, the FDA requested more trial data and analysis
from the drug company. A few months later, the FDA approved Relenza
for sale in the United States. It said the additional information
resolved the concerns raised by the Advisory Committee. Although
the FDA admitted the drug had only "modest clinical benefit."
In
the fall of 1999, Health Canada reviewed the same evidence and approved
the sale of Relenza in this country - in time for last year's flu
season.
Reports
of Reactions
Michael
Elashoff stands by his initial conclusions about Relenza. It should
not, he says, be on the market.
Since it hit the market, there have
been some risks associated with the use of Relenza. In the United
States, there have been reports of serious adverse reactions -
especially in patients with respiratory problems such as asthma.
Elashoff's findings
point to regional differences
Michael
Elashoff found that Relenza appeared to be less effective on North
Americans than on Europeans and people who live in the Southern
Hemisphere. One
difference in the groups of people studied, he found, was that
North Americans used acetaminophen and cough syrup while taking
Relenza, much more than the other two groups. Suggestions were
made that these over the counter drugs might work to reduce flu
symptons or work against the effectiveness of Relenza - but no
conclusions could be drawn. |
In
July of this year, Glaxo Wellcome added a warning that reads Relenza "...
is not generally recommended for treatment of patients with underlying
airways disease because of the risk of serious adverse events..."
Health
Canada has received sixteen reports of suspected adverse reactions
to the drug in the first seven months it was on the market - and
one death was associated with the use of Relenza.
In
response, a Glaxo Wellcome spokesperson told Marketplace, "there
has been no report to my knowledge of any fatality in which Relenza
has been confirmed as the cause... When appropriately prescribed,
Relenza is well tolerated and it is effective."
Career
Troubles
Michael
Elashoff says his career went downhill after he told the FDA Advisory
Committee that Relenza was not effective in North America. His bosses,
he said, made him feel as though he had done something wrong.
"They
were very upset," Elashoff said. "I was sort of a convenient
person to blame for it. And within fairly short order, I was told
that I wouldn't be reviewing the other flu drug, Tamiflu, that
I'd been scheduled to work on."
Dr.
Larry Sasich is a pharmacist and a consumer advocate with the Public
Citizen Health and Research Group in Washington. He's also a critic
of the relationship between the FDA and drug companies.
We
showed Sasich the letter Glaxo Wellcome wrote after Elashoff told
the committee that Relenza was not effective in North America.
"It
sounded like it was written by a very angry 900 pound gorilla drug
company that was having a temper tantrum because it thought it had
a slam dunk on a new drug with a potential half a billion dollar
market," Sasich said.
Sasich
added that he's heard of FDA medical reviewers being transferred
after recommending a drug not be approved.
That's
what happened to Michael Elashoff.
"I
was told I wouldn't be doing any more advisory committee meetings,"
Elashoff said. "I wouldn't be working on any drugs that were
quote unquote, controversial. And there was the suggestion, it's
probably better if you leave the division."
Relenza and the
elderly
As a condition of its marketing
approval, Glaxo Wellcome has agreed to do tests to see
if Relenza might be effective on high risk patients like
the elderly and to determine whether the drug could be
used for prevention. Doctors are hoping it can play a role
there. |
Elashoff
reluctantly took the transfer. But after several months, he left
the FDA, disillusioned by the Relenza experience.
Marketplace wanted to talk to the FDA about their former employee, but they
refused, saying they could not comment on a personnel matter. We
also asked Glaxo Wellcome for an on-camera interview. They, too,
refused.
Michael
Elashoff landed on his feet. He received several job offers within
weeks of leaving the FDA last August. He now works for a genetic
research company.
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